The new conquest set is exactly what you're looking for. But if it's out of your price range, you could try Mantle of the Extensive Mind, or Mercurial Mantle/Shoulderwraps (they're more of an aqua though),

Do any of the items you mentioned (including new conquest ones) have a nice looking green glow while in Shadowform?
Something like the intensity of Warlord's Satin Mantle or roughly the same.